Pipe-wrench.



PATENTED JULY l2, 1904.

H. R. SINCLAIR.

PIPE WRENCH.

APPLICATION FILED APR. 1s, 1903.

N0 MODEL.

UNITED STATEs Patented July 12, 1904.

PATENT OFFICE.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 764,641, dated July 12,1904.

Application filed April 18,1903.

To f/,/l whom] t may con/067172,:

Be it known that I, HARRY R. SINGLAIR, a citizen of the United States,residing at 'Voi'cestci', county of I/Vorcester, State of Massachusetts,have invented a new and useful Improvement in Pipe-l/Vrenches, of whichthe following', taken in connection with the accompanying' drawings, isa specification.

This invention relates to pipe-wrenches; and it consists in animprovement in the means for attaching' the flexible pipe-encircling'member to the head of the wrench.

Of the accompanying' drawings, Figure 1 represents a perspective view ofa pipe-wrench embodying' my improvement. Fig. 2 represents a section ofthe wrench entire with encircling member, showing' the handle and thehead integral therewith. Fig. 3 represents the slotted head withencircling member attached. Fig'. 4 represents that part of the headcontaining the slots and showing' thebiting edge of the slot. Fig. 5 andFig. 6 show still different ways by which the pipe-encircling member maybe attached to the slotted head.

The same reference characters ind icate'similar parts or features in allthe drawings.

Referring' to the drawings, l is the handle of the wrench. 2 is thehead, which is provided with the three transverse slots 8, 3, and 3. Theend of tbehead has the nose 4, which gives the pressure to tighten theencircling member about the pipe 6 when the handle is turned in thedirection of the arrow t in Fig. 1. The wall of the central slot 3terminates in a biting' edg'e 7, which may be serrated or roughened tog'ive a better grip. In order to make the wrench completely reversible,I prefer to form a biting' edge 7 at each end of said slot 3', though myinvention would not be departed from if only vone such biting' edge 7were employed.

In arranging the wrench for use the end of the flexible member ispushedinto the eentral slot 3' in Fig'. 4 far enoug'h to fold over on any oneof the biting edges 7, as shown at 10. ble member back through either 3or 3 and adjusting' it about the pipe, as shown either in Figs. 2 or 3,the st'rain on said member Then by passing' the free end of the flexi-Serial No. 153,249. (No model.)

folded end l() to force said end 10 hard against the biting edge 7 overwhich it is folded, and the construction is such that the greater thestrain on the strap or flexible member the harder the end lO is pressedagainst the biting edge 7 and the more securely the member is attachedto the handle.

The wrench is complete in a handle with slotted head integ'ral therewithand a pipeencircling member attached thereto by frictional contact withthe bitingedg'es, and therefore in the construction of the wrenchextreme simplicity has been reached.

While the arrangement of slots and biting' edges herein illustrated iswhat I deem most practical, yet I wish it understood that my inventionis not limited to the precise construction shown, as other arrangementsof slots and biting edges may be employed which will come within myinvention.

The important feature of the invention consists in a strap-wrench whichhas only two elements-namely, a handle and a pipe-encircling' member-andin which the pipe-encir cling member is secured to the handle solely bythe frictional engagement between said member and the head'and withoutthe use of sewing, pins, wedges, or any other vsecuring means. Otherconstructions use a pin, wedge, shackle, or other device in addition tothe handle and flexible member. y

Having described my invention, though without attempting to set forth indetail all the forms in which it may be embodied, what I claim, anddesire to secure by Letters Patent, is-

1. In a pipe-wrench a head presenting a nose, and having threetransverse slots, the Walls of one of which terminate in a biting' edge,and a flexible member adapted to encircle the pipe, said member havingits end passed through the central slot, and back through either of theother slots, in such a way as to confine the short end between thebiting' edge and the body of the strap.

2. A pipe-wrench "having a head provided with a plurality of transverseslots of different widths, Ain combination with a flexiblepipe-encircling' member of a thickness subcauses that portion of itwhich overlies the IOO stantially equal to the width of the nerrowest tothis speeeation in the presence of two witof said slots, said memberbeingthreaded nesses. k

through seid slots With one end projecting slightly from said narrowestSlot and clamped against the edge thereof by the body of said Witnesses:

member. F. C. CUTLER, In Witness whereofl l have signed my neme C. F.WEssoN.

HARRY R. SINCLAIR.

